/**
* vmw_stdu_bind_fb - Bind an fb to a defined screen target
*
* @dev_priv: Pointer to a device private struct.
* @crtc: The crtc holding the screen target.
* @mode: The mode currently used by the screen target. Must be non-NULL.
* @new_fb: The new framebuffer to bind. Must be non-NULL.
*
* RETURNS:
* 0 on success, error code on failure.
*/
static int vmw_stdu_bind_fb(struct vmw_private *dev_priv,
struct drm_crtc *crtc,
struct drm_display_mode *mode,
struct drm_framebuffer *new_fb)
{
struct vmw_screen_target_display_unit *stdu = vmw_crtc_to_stdu(crtc);
struct vmw_framebuffer *vfb = vmw_framebuffer_to_vfb(new_fb);
struct vmw_surface *new_display_srf = NULL;
enum stdu_content_type new_content_type;
struct vmw_framebuffer_surface *new_vfbs;
int ret;
WARN_ON_ONCE(!stdu->defined);
new_vfbs = (vfb->dmabuf) ? NULL : vmw_framebuffer_to_vfbs(new_fb);
if (new_vfbs && new_vfbs->surface->base_size.width == mode->hdisplay &&
new_vfbs->surface->base_size.height == mode->vdisplay)
new_content_type = SAME_AS_DISPLAY;
else if (vfb->dmabuf)
new_content_type = SEPARATE_DMA;
else
new_content_type = SEPARATE_SURFACE;
if (new_content_type != SAME_AS_DISPLAY &&
!stdu->display_srf) {
struct vmw_surface content_srf;
struct drm_vmw_size display_base_size = {0};
display_base_size.width = mode->hdisplay;
display_base_size.height = mode->vdisplay;
display_base_size.depth = 1;
/*
* If content buffer is a DMA buf, then we have to construct
* surface info
*/
if (new_content_type == SEPARATE_DMA) {
switch (new_fb->bits_per_pixel) {
case 32:
content_srf.format = SVGA3D_X8R8G8B8;
break;
case 16:
content_srf.format = SVGA3D_R5G6B5;
break;
case 8:
content_srf.format = SVGA3D_P8;
break;
default:
DRM_ERROR("Invalid format\n");
return -EINVAL;
}
content_srf.flags = 0;
content_srf.mip_levels[0] = 1;
content_srf.multisample_count = 0;
} else {
content_srf = *new_vfbs->surface;
}
ret = vmw_surface_gb_priv_define(crtc->dev,
0, /* because kernel visible only */
content_srf.flags,
content_srf.format,
true, /* a scanout buffer */
content_srf.mip_levels[0],
content_srf.multisample_count,
0,
display_base_size,
&new_display_srf);
if (unlikely(ret != 0)) {
DRM_ERROR("Could not allocate screen target surface.\n");
return ret;
}
} else if (new_content_type == SAME_AS_DISPLAY) {
new_display_srf = vmw_surface_reference(new_vfbs->surface);
}
if (new_display_srf) {
/* Pin new surface before flipping */
ret = vmw_resource_pin(&new_display_srf->res, false);
if (ret)
goto out_srf_unref;
ret = vmw_stdu_bind_st(dev_priv, stdu, &new_display_srf->res);
if (ret)
goto out_srf_unpin;
/* Unpin and unreference old surface */
vmw_stdu_unpin_display(stdu);
/* Transfer the reference */
stdu->display_srf = new_display_srf;
new_display_srf = NULL;
}
crtc->primary->fb = new_fb;
stdu->content_fb_type = new_content_type;
return 0;
out_srf_unpin:
vmw_resource_unpin(&new_display_srf->res);
out_srf_unref:
vmw_surface_unreference(&new_display_srf);
return ret;
}
/**
* vmw_stdu_crtc_set_config - Sets a mode
*
* @set: mode parameters
*
* This function is the device-specific portion of the DRM CRTC mode set.
* For the SVGA device, we do this by defining a Screen Target, binding a
* GB Surface to that target, and finally update the screen target.
*
* RETURNS:
* 0 on success, error code otherwise
*/
static int vmw_stdu_crtc_set_config(struct drm_mode_set *set)
{
struct vmw_private *dev_priv;
struct vmw_screen_target_display_unit *stdu;
struct vmw_framebuffer *vfb;
struct vmw_framebuffer_surface *new_vfbs;
struct drm_display_mode *mode;
struct drm_framebuffer *new_fb;
struct drm_crtc *crtc;
struct drm_encoder *encoder;
struct drm_connector *connector;
int ret;
if (!set || !set->crtc)
return -EINVAL;
crtc = set->crtc;
crtc->x = set->x;
crtc->y = set->y;
stdu = vmw_crtc_to_stdu(crtc);
mode = set->mode;
new_fb = set->fb;
dev_priv = vmw_priv(crtc->dev);
if (set->num_connectors > 1) {
DRM_ERROR("Too many connectors\n");
return -EINVAL;
}
if (set->num_connectors == 1 &&
set->connectors[0] != &stdu->base.connector) {
DRM_ERROR("Connectors don't match %p %p\n",
set->connectors[0], &stdu->base.connector);
return -EINVAL;
}
/* Since they always map one to one these are safe */
connector = &stdu->base.connector;
encoder = &stdu->base.encoder;
/*
* After this point the CRTC will be considered off unless a new fb
* is bound
*/
if (stdu->defined) {
/* Unbind current surface by binding an invalid one */
ret = vmw_stdu_bind_st(dev_priv, stdu, NULL);
if (unlikely(ret != 0))
return ret;
/* Update Screen Target, display will now be blank */
if (crtc->primary->fb) {
vmw_stdu_update_st(dev_priv, stdu);
if (unlikely(ret != 0))
return ret;
}
crtc->primary->fb = NULL;
crtc->enabled = false;
encoder->crtc = NULL;
connector->encoder = NULL;
vmw_stdu_unpin_display(stdu);
stdu->content_fb = NULL;
stdu->content_fb_type = SAME_AS_DISPLAY;
ret = vmw_stdu_destroy_st(dev_priv, stdu);
/* The hardware is hung, give up */
if (unlikely(ret != 0))
return ret;
}
/* Any of these conditions means the caller wants CRTC off */
if (set->num_connectors == 0 || !mode || !new_fb)
return 0;
if (set->x + mode->hdisplay > new_fb->width ||
set->y + mode->vdisplay > new_fb->height) {
DRM_ERROR("Set outside of framebuffer\n");
return -EINVAL;
}
stdu->content_fb = new_fb;
vfb = vmw_framebuffer_to_vfb(stdu->content_fb);
if (vfb->dmabuf)
stdu->content_fb_type = SEPARATE_DMA;
/*
* If the requested mode is different than the width and height
* of the FB or if the content buffer is a DMA buf, then allocate
* a display FB that matches the dimension of the mode
*/
if (mode->hdisplay != new_fb->width ||
mode->vdisplay != new_fb->height ||
stdu->content_fb_type != SAME_AS_DISPLAY) {
struct vmw_surface content_srf;
struct drm_vmw_size display_base_size = {0};
struct vmw_surface *display_srf;
display_base_size.width = mode->hdisplay;
display_base_size.height = mode->vdisplay;
display_base_size.depth = 1;
/*
* If content buffer is a DMA buf, then we have to construct
* surface info
*/
if (stdu->content_fb_type == SEPARATE_DMA) {
switch (new_fb->bits_per_pixel) {
case 32:
content_srf.format = SVGA3D_X8R8G8B8;
break;
case 16:
content_srf.format = SVGA3D_R5G6B5;
break;
case 8:
content_srf.format = SVGA3D_P8;
break;
default:
DRM_ERROR("Invalid format\n");
ret = -EINVAL;
goto err_unref_content;
}
content_srf.flags = 0;
content_srf.mip_levels[0] = 1;
content_srf.multisample_count = 0;
} else {
stdu->content_fb_type = SEPARATE_SURFACE;
new_vfbs = vmw_framebuffer_to_vfbs(new_fb);
content_srf = *new_vfbs->surface;
}
ret = vmw_surface_gb_priv_define(crtc->dev,
0, /* because kernel visible only */
content_srf.flags,
content_srf.format,
true, /* a scanout buffer */
content_srf.mip_levels[0],
content_srf.multisample_count,
0,
display_base_size,
&display_srf);
if (unlikely(ret != 0)) {
DRM_ERROR("Cannot allocate a display FB.\n");
goto err_unref_content;
}
stdu->display_srf = display_srf;
} else {
new_vfbs = vmw_framebuffer_to_vfbs(new_fb);
stdu->display_srf = new_vfbs->surface;
}
ret = vmw_stdu_pin_display(stdu);
if (unlikely(ret != 0)) {
stdu->display_srf = NULL;
goto err_unref_content;
}
vmw_svga_enable(dev_priv);
/*
* Steps to displaying a surface, assume surface is already
* bound:
* 1. define a screen target
* 2. bind a fb to the screen target
* 3. update that screen target (this is done later by
* vmw_kms_stdu_do_surface_dirty_or_present)
*/
ret = vmw_stdu_define_st(dev_priv, stdu);
if (unlikely(ret != 0))
goto err_unpin_display_and_content;
ret = vmw_stdu_bind_st(dev_priv, stdu, &stdu->display_srf->res);
if (unlikely(ret != 0))
goto err_unpin_destroy_st;
connector->encoder = encoder;
encoder->crtc = crtc;
crtc->mode = *mode;
crtc->primary->fb = new_fb;
crtc->enabled = true;
return ret;
err_unpin_destroy_st:
vmw_stdu_destroy_st(dev_priv, stdu);
err_unpin_display_and_content:
vmw_stdu_unpin_display(stdu);
err_unref_content:
stdu->content_fb = NULL;
return ret;
}
